10 Hidden Video Game Bosses You Weren't Supposed To See

It's clear that so much time, effort, and artistry went into designing and executing Cuphead's gorgeous enemies that it's difficult to picture any extras being buried in the game's files.

But that's absolutely the case, the very oddest of which is surely The Light, who can be fought by modding Cuphead to access its debug menu.

The Light would've appeared as a mini-boss during the player's encounter with King Dice, and at this point actually resembled the original 2010 design for Cuphead himself - a green creature wearing a top hat.

Fans have speculated this drawing was simply used as a placeholder during development, as were images of Cuphead co-creator Jared Moldenhauer's head for the Light's minions.

The fight itself also takes place in a rudimentary, incomplete arena - a black expanse with two platforms and a series of beams firing outwards from the boss' position.

The name of the game is to avoid the red-coloured beams and the Light's minions while attacking him until he perishes.

The fight was clearly in an early stage of development, though is believed to have taken place in a nightclub with a disco ball firing lasers at Cuphead.

After players discovered the unfinished mini-boss, though, developers Studio MDHR released a patch which removed it from the game code entirely.